A nickname for Adam.

plural of Ad

plural of ad

Initialism of American Dialect Society. / (US, military) Initialism of Active Denial System.

Initialism of automated decision support. / (aviation) Initialism of automatic dependent surveillance. / (linguistics) Initialism of adult-directed speech.

(video games) Initialism of aim down sights.

(aviation) Initialism of automatic dependent surveillance - addressed. (automated transmission of location information for aircraft using an airline specified communication system)

plural of AD

(physics, mathematics, cosmology) Initialism of anti de Sitter.

(often punctuated) Initialism of anno Domini (borrowed from Latin); in the year of our Lord.